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internetnews.com: Ravi Arimilli, IBM Fellow and Chief Architect

"In 2000, IBM embarked on an ambitious strategy to boost Unix
server market share after years of watching its sales suffer at the
hands of rivals HP and Sun Microsystems.

"The company trotted out its first Power4 machines in 2001 and
promptly set about devouring market share from its rivals, watching
its plot in the Unix land grow from 15 percent to 25 percent
between 2000 and 2004, according to IDC..."